Improving the Ductility of Knee Joints between Rectangular Hollow Sections
Publication: Journal of Structural Engineering
Volume 130, Issue 11
Abstract
This paper proposes a new welding-based solution that significantly increases the rotation capacity of a stiffened welded knee joint between cold-formed rectangular hollow sections under opening moment. The proposed solution is more economical than the use of internal sleeves and can be applied to new as well as existing structures. The solution involves the use of extra layers of weld on the inner (tension) flange of a stiffened welded knee joint. Laboratory test results are presented to demonstrate that the solution enabled such a joint between DuraGal C450 or rectangular hollow sections manufactured to AS 1163 to satisfy the rotation capacity requirement specified for plastic design of steel frames. The reason why the new solution results in increased rotation capacities is explained in terms of strain redistribution and strain reduction in the tensile regions around the knee joints.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 130 • Issue 11 • November 2004
Pages: 1790 - 1798
Copyright
Copyright © 2004 ASCE.
History
Published online: Oct 15, 2004
Published in print: Nov 2004
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